liz: amazon's future for package delivery, we've been talk about it all day, it does sound like science fiction. jeff bezos says deliveries by drone are just a few years away. but next we're speaking with an entrepreneur already testing drones for good, meaning deliveries of things like medicine in other countries. david: fascinating stuff. you want to stay tuned for that. this year's cyber monday will be busiest day of the year for fedex. we'll head to the company's shipping center in bronx, new york, to see how it plans to handle all those packages. ♪ [ male announcer ] here's a question for you. if every u.s. home replaced one light bulb with a compact fluorescent bulb, the energy saved could light how many homes? 1 million? 2 million? 3 million? the answer is... 3illion homes. by 2030, investments in energefficiency could help americans save $300 billion each year. take the energy quiz. energy lis here take the energy quiz. if hey breathing's hard.me, know the feeling? copd includes emphysema and chronic bronchitis. spiriva is a once-daily inhaled copd maintenance treatment that h